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			<span id="ctl00_ArticleInfo_ArticleTitleLabel" class="style22"><h1>典型的颜色空间</h1></span>
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			<span id="ctl00_ArticleInfo_ArticleInfoLabel" style="font-size: 9pt;"><div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（一）CIE</span><span style="font-size: 11pt; color: black;">色度模型</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">国际照明委员会（</span><span style="font-size: 11pt; color: black;">CIE</span><span style="font-size: 11pt; color: black;">，</span><span style="font-size: 11pt; color: black;">Commission Internationale de L'Eclairage / International </span><span style="font-size: 11pt; color: black;">Commission on Illumination</span><span style="font-size: 11pt; color: black;">）的色度模型是最早使用的模型之一。它是三维模型，其中，</span><span style="font-size: 11pt; color: black;">x</span><span style="font-size: 11pt; color: black;">和</span><span style="font-size: 11pt; color: black;">y</span><span style="font-size: 11pt; color: black;">两维定义颜色，第</span><span style="font-size: 11pt; color: black;">3</span><span style="font-size: 11pt; color: black;">维定义亮度。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">CIE </span><span style="font-size: 11pt; color: black;">在</span><span style="font-size: 11pt; color: black;">1976 </span><span style="font-size: 11pt; color: black;">年规定了两种颜色空间。一种是用于自照明的颜色空间，叫做</span><span style="font-size: 11pt; color: black;">CIE LUV</span><span style="font-size: 11pt; color: black;">（图0</span><span style="font-size: 11pt; color: black;">6-02-2</span><span style="font-size: 11pt; color: black;">）。</span><span style="font-size: 11pt; color: black;">&nbsp; </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><img v:shapes="_x0000_i1028" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125815708.jpg" width="235" height="219"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><span style="font-size: 11pt; color: black;">图</span><span style="font-size: 11pt; color: black;">06-02-2&nbsp; CIE 1976 Lu</span><span style="font-size: 11pt; color: black;">’</span><span style="font-size: 11pt; color: black;">v</span><span style="font-size: 11pt; color: black;">’</span><span style="font-size: 11pt; color: black;">色度图</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">另一种用于非自照明的颜色空间，叫做</span><span style="font-size: 11pt; color: black;">CIE 1976 L</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">a</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">b</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">，或者叫</span><span style="font-size: 11pt; color: black;">CIE LAB</span><span style="font-size: 11pt; color: black;">。</span><span style="font-size: 11pt; color: black;">CIE LAB </span><span style="font-size: 11pt; color: black;">系统使用的坐标叫做对色坐标</span><span style="font-size: 11pt; color: black;">(opponent color coordinate)</span><span style="font-size: 11pt; color: black;">，如图</span><span style="font-size: 11pt; color: black;">06</span><span style="font-size: 11pt; color: black;">-02-3 </span><span style="font-size: 11pt; color: black;">所示。</span><span style="font-size: 11pt; color: black;">CIELAB </span><span style="font-size: 11pt; color: black;">使用</span><span style="font-size: 11pt; color: black;">b</span><span style="font-size: 11pt; color: black;"><sup>*</sup>, a<sup> *</sup></span><span style="font-size: 11pt; color: black;">和</span><span style="font-size: 11pt; color: black;"> L</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">坐标轴定义</span><span style="font-size: 11pt; color: black;">CIE </span><span style="font-size: 11pt; color: black;">颜色空间。其中，</span><span style="font-size: 11pt; color: black;">L</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">值代表光亮度，其值从</span><span style="font-size: 11pt; color: black;">0(</span><span style="font-size: 11pt; color: black;">黑色</span><span style="font-size: 11pt; color: black;">)</span><span style="font-size: 11pt; color: black;">~</span><span style="font-size: 11pt; color: black;">100(</span><span style="font-size: 11pt; color: black;">白色</span><span style="font-size: 11pt; color: black;">)</span><span style="font-size: 11pt; color: black;">。</span><span style="font-size: 11pt; color: black;">b</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">和</span><span style="font-size: 11pt; color: black;">a</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">代表色度坐标，其中</span><span style="font-size: 11pt; color: black;">a</span><span style="font-size: 11pt; color: black;"><sup>*</sup> </span><span style="font-size: 11pt; color: black;">代表红</span><span style="font-size: 11pt; color: black;">-</span><span style="font-size: 11pt; color: black;">绿轴，</span><span style="font-size: 11pt; color: black;">b</span><span style="font-size: 11pt; color: black;"><sup>*</sup> </span><span style="font-size: 11pt; color: black;">代表黄</span><span style="font-size: 11pt; color: black;">-</span><span style="font-size: 11pt; color: black;">蓝轴，它们的值从</span><span style="font-size: 11pt; color: black;">0</span><span style="font-size: 11pt; color: black;">到</span><span style="font-size: 11pt; color: black;">10</span><span style="font-size: 11pt; color: black;">。</span><span style="font-size: 11pt; color: black;">a</span><span style="font-size: 11pt; color: black;"><sup>*</sup></span><span style="font-size: 11pt; color: black;">=</span><span style="font-size: 11pt; color: black;"> b</span><span style="font-size: 11pt; color: black;"><sup>*</sup> </span><span style="font-size: 11pt; color: black;">= </span><span style="font-size: 11pt; color: black;">0</span><span style="font-size: 11pt; color: black;">表示无色，因此</span><span style="font-size: 11pt; color: black;">L</span><span style="font-size: 11pt; color: black;"><sup>*</sup> </span><span style="font-size: 11pt; color: black;">就代表从黑到白的比例系数。使用对色坐标（opponet color coordinate）的想法来自这样的概念：颜色不能同时是红和绿，或者同时是黄和蓝，但颜色可以被认为是红和黄、红和蓝、绿和黄以及绿和蓝的组合。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><img v:shapes="_x0000_i1029" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125816302.jpg" width="359" height="181"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><span style="font-size: 11pt; color: black;">图</span><span style="font-size: 11pt; color: black;">06-02-3 CIE LAB </span><span style="font-size: 11pt; color: black;">颜色空间</span><span style="font-size: 11pt; color: black;">&nbsp; </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">CIE XYZ </span><span style="font-size: 11pt; color: black;">是国际照明委员会在</span><span style="font-size: 11pt; color: black;">1931 </span><span style="font-size: 11pt; color: black;">年开发并在</span><span style="font-size: 11pt; color: black;">1964年 </span><span style="font-size: 11pt; color: black;">修订的</span><span style="font-size: 11pt; color: black;">CIE </span><span style="font-size: 11pt; color: black;">颜色系统</span><span style="font-size: 11pt; color: black;">(CIE Color System)</span><span style="font-size: 11pt; color: black;">，该系统是其他颜色系统的基础。它使用相应于红、绿和蓝三种颜色作为三种基色，而所有其他颜色都从这三种颜色中导出。通过相加混色或者相减混色，任何色调都可以使用不同量的基色产生。</span><span style="font-size: 11pt; color: black;">CIE 1931 </span><span style="font-size: 11pt; color: black;">色度图</span><span style="font-size: 11pt; color: black;">(CIE 1931 Chromaticity Diagram)</span><span style="font-size: 11pt; color: black;">，如图</span><span style="font-size: 11pt; color: black;">06-02-4(a)</span><span style="font-size: 11pt; color: black;">所示，图</span><span style="font-size: 11pt; color: black;">(b)</span><span style="font-size: 11pt; color: black;">是它的轮廓图。图</span><span style="font-size: 11pt; color: black;">(a)</span><span style="font-size: 11pt; color: black;">中的</span><span style="font-size: 11pt; color: black;">A</span><span style="font-size: 11pt; color: black;">点在色度图上的坐标是</span><span style="font-size: 11pt; color: black;">x </span><span style="font-size: 11pt; color: black;">＝</span><span style="font-size: 11pt; color: black;">0.4832</span><span style="font-size: 11pt; color: black;">，</span><span style="font-size: 11pt; color: black;">y </span><span style="font-size: 11pt; color: black;">＝</span><span style="font-size: 11pt; color: black;">0.3045</span><span style="font-size: 11pt; color: black;">，它的颜色与红苹果的颜色相匹配。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><img v:shapes="_x0000_i1025" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125818693.jpg" width="431" height="266"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><span style="font-size: 11pt; color: black;">图</span><span style="font-size: 11pt; color: black;">06-02-4&nbsp; CIE 1931</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">图0</span><span style="font-size: 11pt; color: black;">6-02-4 CIE 1931</span><span style="font-size: 11pt; color: black;">色度图是用标称值表示的</span><span style="font-size: 11pt; color: black;">CIE </span><span style="font-size: 11pt; color: black;">色度图，</span><span style="font-size: 11pt; color: black;">x </span><span style="font-size: 11pt; color: black;">表示红色分量，</span><span style="font-size: 11pt; color: black;">y </span><span style="font-size: 11pt; color: black;">表示绿色分量。图中的</span><span style="font-size: 11pt; color: black;">E </span><span style="font-size: 11pt; color: black;">点代表白光，它的坐标为</span><span style="font-size: 11pt; color: black;">(0.33</span><span style="font-size: 11pt; color: black;">，</span><span style="font-size: 11pt; color: black;">0.33)</span><span style="font-size: 11pt; color: black;">；环绕在颜色空间边沿的颜色是光谱色，边界代表光谱色的最大饱和度，边界上的数字表示光谱色的波长，其轮廓包含所有的感知色调。所有单色光都位于舌形曲线上，这条曲线就是单色轨迹，曲线旁标注的数字是单色</span><span style="font-size: 11pt; color: black;">(</span><span style="font-size: 11pt; color: black;">或称光谱色</span><span style="font-size: 11pt; color: black;">)</span><span style="font-size: 11pt; color: black;">光的波长值；自然界中各种实际颜色都位于这条闭合曲线内；</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">系统中选用的物理三基色在色度图的舌形曲线上。</span><span style="font-size: 11pt; color: black;">&nbsp; </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">二）</span> <span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">计算机颜色显示器显示颜色的原理与彩色电视机一样，都是采用</span><span style="font-size: 11pt; color: black;">R</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">G</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">B</span><span style="font-size: 11pt; color: black;">相加混色的原理，通过发射出三种不同强度的电子束，使屏幕内侧覆盖的红、绿、蓝磷光材料发光而产生颜色的。这种颜色的表示方法称为</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间表示。在多媒体计算机技术中，用得最多的是</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间表示（图06-01-9）。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">根据三基色原理，用基色光单位来表示光的量，则在</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间，任意色光</span><span style="font-size: 11pt; color: black;">F</span><span style="font-size: 11pt; color: black;">都可以用</span><span style="font-size: 11pt; color: black;">R</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">G</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">B</span><span style="font-size: 11pt; color: black;">三色不同分量的相加混合而成：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; F</span><span style="font-size: 11pt; color: black;">＝</span><span style="font-size: 11pt; color: black;">r [ R ] + g [ G ] + b [ B ] </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间还可以用一个三维的立方体来描述（</span><span style="font-size: 11pt; color: black;">图06-02-5</span><span style="font-size: 11pt; color: black;">）。</span><span style="font-size: 11pt; color: black;"> &nbsp; </span></div>
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            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">图06-02-5&nbsp; </span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间</span></div>
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<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">我们可知自然界中任何一种色光都可由</span><span style="font-size: 11pt; color: black;">R</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">G</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">B</span><span style="font-size: 11pt; color: black;">三基色按不同的比例相加混合而成，当三基色分量都为</span><span style="font-size: 11pt; color: black;">0</span><span style="font-size: 11pt; color: black;">（最弱）时混合为黑色光；当三基色分量都为</span><span style="font-size: 11pt; color: black;">k</span><span style="font-size: 11pt; color: black;">（最强）时混合为白色光。任一颜色</span><span style="font-size: 11pt; color: black;">F</span><span style="font-size: 11pt; color: black;">是这个立方体坐标中的一点，调整三色系数</span><span style="font-size: 11pt; color: black;">r</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">g</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">b</span><span style="font-size: 11pt; color: black;">中的任一系数都会改变</span><span style="font-size: 11pt; color: black;">F</span><span style="font-size: 11pt; color: black;">的坐标值，也即改变了</span><span style="font-size: 11pt; color: black;">F</span><span style="font-size: 11pt; color: black;">的色值。</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间采用物理三基色表示，因而物理意义很清楚，适合彩色显像管工作。然而这一体制并不适应人的视觉特点。因而，产生了其他不同的颜色空间表示法。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">三）</span><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">颜色空间</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">Hue</span><span style="font-size: 11pt; color: black;">，</span><span style="font-size: 11pt; color: black;">Saturation and Intensity</span><span style="font-size: 11pt; color: black;">）颜色空间是从人的视觉系统出发，用色调（</span><span style="font-size: 11pt; color: black;">Hue</span><span style="font-size: 11pt; color: black;">）、色饱和度（</span><span style="font-size: 11pt; color: black;">Saturation</span><span style="font-size: 11pt; color: black;">或</span><span style="font-size: 11pt; color: black;">Chroma</span><span style="font-size: 11pt; color: black;">）和亮度（</span><span style="font-size: 11pt; color: black;">Intensity</span><span style="font-size: 11pt; color: black;">或</span><span style="font-size: 11pt; color: black;">Brightness</span><span style="font-size: 11pt; color: black;">）来描述颜色。</span><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">颜色空间可以用一个圆锥空间模型来描述</span><span style="font-size: 11pt; color: black;">（图06-02-6）</span><span style="font-size: 11pt; color: black;">。</span></div>
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<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><strong><span style="font-weight: normal; font-size: 11pt; color: black;">图</span><span style="font-weight: normal; font-size: 11pt; color: black;">06-0<span style="font-weight: normal; font-size: 11pt; color: black;">2-6 </span>&nbsp;HSI</span><span style="font-weight: normal; font-size: 11pt; color: black;">颜色圆锥空间模型</span></strong></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">用这种描述</span><span style="font-size: 11pt; color: black;">HIS</span><span style="font-size: 11pt; color: black;">颜色空间的圆锥模型相当复杂，但确能把色调、亮度和色饱和度的变化情形表现得很清楚。其中：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">A</span><span style="font-size: 11pt; color: black;">）</span><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">圆锥空间模型</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">B</span><span style="font-size: 11pt; color: black;">）线条示意图：圆锥上亮度、色度和饱和度的关系。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">C</span><span style="font-size: 11pt; color: black;">）纵轴表示亮度：亮度值是沿着圆锥的轴线度量的，沿着圆锥轴线上的点表示完全不饱和的颜色，按照不同的灰度等级，最亮点为纯白色、最暗点为纯黑色。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">D</span><span style="font-size: 11pt; color: black;">）圆锥纵切面：描述了同一色调的不同亮度和饱和度关系。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">E</span><span style="font-size: 11pt; color: black;">）圆锥横切面：色调</span><span style="font-size: 11pt; color: black;">H</span><span style="font-size: 11pt; color: black;">为绕着圆锥截面度量的色环，圆周上的颜色为完全饱和的纯色，色饱和度为穿过中心的半径横轴。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">通常把色调和饱和度通称为色度，用来表示颜色的类别与深浅程度。由于人的视觉对亮度的敏感程度远强于对颜色浓淡的敏感程度，为了便于颜色处理和识别，人的视觉系统经常采用</span><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">颜色空间，它比</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间更符合人的视觉特性。在图像处理和计算机视觉中大量算法都可在</span><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">颜色空间中方便地使用，它们可以分开处理而且是相互独立的。因此，在</span><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">颜色空间可以大大简化图像分析和处理的工作量。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">HSI</span><span style="font-size: 11pt; color: black;">颜色空间和</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间只是同一物理量的不同表示法，因而它们之间存在着转换关系，如公式所示：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp; <img v:shapes="_x0000_i1036" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125835302.gif" width="263" height="122"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">其中</span> <img v:shapes="_x0000_i1037" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125835411.gif" width="83" height="31"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">四）</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">Lab</span><span style="font-size: 11pt; color: black;">）颜色空间</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">在现代彩色电视系统中，通常采用三管彩色摄像机或彩色</span><span style="font-size: 11pt; color: black;">CCD</span><span style="font-size: 11pt; color: black;">（电耦合器件）摄像机，它把得到的彩色图像信号，经分色、分别放大校正得到</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">，再经过矩阵变换电路得到亮度信号</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">和两个色差信号</span><span style="font-size: 11pt; color: black;">R</span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">B</span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">，最后发送端将亮度和色差三个信号分别进行编码，用同一信道发送出去。这就是我们常用的</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">颜色空间。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">采用</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">颜色空间的重要性是它的亮度信号</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">和色度信号</span><span style="font-size: 11pt; color: black;">U</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">V</span><span style="font-size: 11pt; color: black;">是分离的。如果只有</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">信号分量而没有</span><span style="font-size: 11pt; color: black;">U</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">V</span><span style="font-size: 11pt; color: black;">分量，那么这样表示的图就是黑白灰度图。彩色电视采用</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">空间正是为了用亮度信号</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">解决彩色电视机与黑白电视机的兼容问题，使黑白电视机也能接收彩色信号。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">根据美国国家电视制式委员会</span><span style="font-size: 11pt; color: black;">NTSC</span><span style="font-size: 11pt; color: black;">制式的标准，当白光的亮度用</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">来表示时，它和红、绿、蓝三色光的关系可用如下式的方程描述：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; Y</span><span style="font-size: 11pt; color: black;">＝</span><span style="font-size: 11pt; color: black;">0.3 R + 0.59 G + 0.11B </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">这就是常用的亮度公式。色差</span><span style="font-size: 11pt; color: black;">U</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">V</span><span style="font-size: 11pt; color: black;">是由</span><span style="font-size: 11pt; color: black;">B</span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">R</span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">按不同比例压缩而成的。</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">颜色空间与</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">颜色空间的转换关系如下：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp; <img v:shapes="_x0000_i1038" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125836989.gif" width="224" height="66"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">如果要由</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">空间转化成</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间，只要进行相应的逆运算即可。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">与</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">颜色空间类似的还有</span><span style="font-size: 11pt; color: black;">Lab</span><span style="font-size: 11pt; color: black;">颜色空间，它也是用亮度和色差来描述颜色分量，其中</span><span style="font-size: 11pt; color: black;">L</span><span style="font-size: 11pt; color: black;">为亮度、</span><span style="font-size: 11pt; color: black;">a</span><span style="font-size: 11pt; color: black;">和</span><span style="font-size: 11pt; color: black;">b</span><span style="font-size: 11pt; color: black;">分别为各色差分量。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">五）</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">颜色空间</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">彩色印刷或彩色打印的纸张是不能发射光线的，因而印刷机或彩色打印机就只能使用一些能够吸收特定的光波而反射其他光波的油墨或颜料。油墨或颜料的3基色是青（</span><span style="font-size: 11pt; color: black;">Cyan</span><span style="font-size: 11pt; color: black;">）、品红（</span><span style="font-size: 11pt; color: black;">Magenta</span><span style="font-size: 11pt; color: black;">）和黄（</span><span style="font-size: 11pt; color: black;">Yellow</span><span style="font-size: 11pt; color: black;">），简称为</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">。青色对应蓝绿色，品红对应紫红色。理论上说，任何一种由颜料表现的颜色都可以用这三种基色按不同的比例混合而成，这种颜色表示方法称</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">颜色空间表示法。彩色打印机和彩色印刷系统都采用</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">颜色空间。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">用</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">模型产生的颜色被称为相减色，是因为它减少了为视觉系统识别颜色所需要的反射光。</span><span style="font-size: 11pt; color: black;">在</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">相减混色中，三基色等量相减时得到黑色；等量黄色</span><span style="font-size: 11pt; color: black;">(Y)</span><span style="font-size: 11pt; color: black;">和品红</span><span style="font-size: 11pt; color: black;">(M)</span><span style="font-size: 11pt; color: black;">相减而青色</span><span style="font-size: 11pt; color: black;">(C)</span><span style="font-size: 11pt; color: black;">为</span><span style="font-size: 11pt; color: black;">0</span><span style="font-size: 11pt; color: black;">时，得到红色</span><span style="font-size: 11pt; color: black;">(R)</span><span style="font-size: 11pt; color: black;">；等量青色</span><span style="font-size: 11pt; color: black;">(C)</span><span style="font-size: 11pt; color: black;">和品红</span><span style="font-size: 11pt; color: black;">(M)</span><span style="font-size: 11pt; color: black;">相减而黄色</span><span style="font-size: 11pt; color: black;">(Y)</span><span style="font-size: 11pt; color: black;">为</span><span style="font-size: 11pt; color: black;">0</span><span style="font-size: 11pt; color: black;">时，得到蓝色</span><span style="font-size: 11pt; color: black;">(B)</span><span style="font-size: 11pt; color: black;">；等量黄色</span><span style="font-size: 11pt; color: black;">(Y)</span><span style="font-size: 11pt; color: black;">和青色</span><span style="font-size: 11pt; color: black;">(C)</span><span style="font-size: 11pt; color: black;">相减而品红</span><span style="font-size: 11pt; color: black;">(M)</span><span style="font-size: 11pt; color: black;">为</span><span style="font-size: 11pt; color: black;">0</span><span style="font-size: 11pt; color: black;">时，得到绿色</span><span style="font-size: 11pt; color: black;">(G)</span><span style="font-size: 11pt; color: black;">。这些三基色相减结果如图</span><span style="font-size: 11pt; color: black;">06-02-7</span><span style="font-size: 11pt; color: black;">所示。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><img v:shapes="_x0000_i1039" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125837114.gif" width="278" height="273"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><span style="font-size: 11pt; color: black;">图</span><span style="font-size: 11pt; color: black;">06-02-7 &nbsp;</span><span style="font-size: 11pt; color: black;">三基色相减</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">空间正好与</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间互补，也即用白色减去</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间中的某一颜色值就等于同样颜色在</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">空间中的值。</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间与</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">空间的互补关系如表06-02-1所示。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;" align="center"><span style="font-size: 11pt; color: black;">表06-02-1 <span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间与</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">空间的互补关系</span></span></div>
<div align="center">
<table id="Table1" style="width: 60%;" width="60%" border="1" cellpadding="0" cellspacing="1">
    <tbody>
        <tr style="height: 18pt;">
            <td style="padding: 0cm; background: rgb(167, 198, 207) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 34.62%; height: 18pt;" width="34%" align="center">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 0px; line-height: 150%;"><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">相加混色</span></div>
            </td>
            <td style="padding: 0cm; background: rgb(167, 198, 207) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 33.62%; height: 18pt;" width="33%" align="center">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 0px; line-height: 150%;"><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">相减混色</span></div>
            </td>
            <td style="padding: 0cm; background: rgb(167, 198, 207) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 30.64%; height: 18pt;" width="30%" align="center">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 0px; line-height: 150%;"><span style="font-size: 11pt; color: black;">对应颜色</span></div>
            </td>
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        <tr style="height: 18pt;">
            <td style="padding: 0cm; background: rgb(237, 237, 248) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 34.62%; height: 18pt;" width="34%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">0 0 0 </span></div>
            </td>
            <td style="padding: 0cm; background: rgb(237, 237, 248) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 33.62%; height: 18pt;" width="33%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">1 1 1 </span></div>
            </td>
            <td style="padding: 0cm; background: black none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 30.64%; height: 18pt;" width="30%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp;</div>
            </td>
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        <tr style="height: 18pt;">
            <td style="padding: 0cm; background: rgb(237, 237, 248) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 34.62%; height: 18pt;" width="34%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">0 0 1 </span></div>
            </td>
            <td style="padding: 0cm; background: rgb(237, 237, 248) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 33.62%; height: 18pt;" width="33%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">1 1 0 </span></div>
            </td>
            <td style="padding: 0cm; background: blue none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 30.64%; height: 18pt;" width="30%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp;</div>
            </td>
        </tr>
        <tr style="height: 18pt;">
            <td style="padding: 0cm; background: rgb(237, 237, 248) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; width: 34.62%; height: 18pt;" width="34%">
            <div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">0 1 0 </span></div>
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<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">根据这个原理，很容易把</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间转换成</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">空间。由于彩色墨水和颜料的化学特性，用等量的</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">三基色得到的黑色不是真正的黑色，因此在印刷术中常加一种真正的黑色（</span><span style="font-size: 11pt; color: black;">black ink</span><span style="font-size: 11pt; color: black;">），所以</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">又写成</span><span style="font-size: 11pt; color: black;">CMYK</span><span style="font-size: 11pt; color: black;">。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">实际应用中，一幅图像在计算机中用</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间显示；用</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">或</span><span style="font-size: 11pt; color: black;">SHI</span><span style="font-size: 11pt; color: black;">空间编辑处理；打印输出时要转换成</span><span style="font-size: 11pt; color: black;">CMY</span><span style="font-size: 11pt; color: black;">空间；如果要印刷，则要转换成</span><span style="font-size: 11pt; color: black;">CMYK</span><span style="font-size: 11pt; color: black;">四幅印刷分色图，用于套印彩色印刷品。</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">六）</span><span style="font-size: 11pt; color: black;">YIQ</span><span style="font-size: 11pt; color: black;">模型</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">YIQ</span><span style="font-size: 11pt; color: black;">模型与</span><span style="font-size: 11pt; color: black;">YUV</span><span style="font-size: 11pt; color: black;">模型非常类似，是在彩色电视制式中使用的另一种重要的颜色模型，</span><span style="font-size: 11pt; color: black;">NTSC</span><span style="font-size: 11pt; color: black;">彩色电视制式中使用。这里的</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">表示亮度，</span><span style="font-size: 11pt; color: black;">I</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">Q</span><span style="font-size: 11pt; color: black;">是两个彩色分量。</span><span style="font-size: 11pt; color: black;">YIQ</span><span style="font-size: 11pt; color: black;">和</span><span style="font-size: 11pt; color: black;"> RGB</span><span style="font-size: 11pt; color: black;">的对应关系用下面的方程式表示：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; Y = 0.299R + 0.587G + 0.114B </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; I = 0.596R - 0.275G - 0.321B </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; Q = 0.212R - 0.523G + 0.311B </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">或者写成矩阵的形式，</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp; <img v:shapes="_x0000_i1026" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/200782212583821.gif" width="229" height="74"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">（</span><span style="font-size: 11pt; color: black;">七）</span><span style="font-size: 11pt; color: black;">YC<sub>r</sub>C<sub>b</sub></span><span style="font-size: 11pt; color: black;">模型</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">C<sub>r</sub>C<sub>b</sub></span><span style="font-size: 11pt; color: black;">模型适用于计算机用的显示器。它也是使用</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">、</span><span style="font-size: 11pt; color: black;">C<sub>r</sub></span><span style="font-size: 11pt; color: black;">和</span><span style="font-size: 11pt; color: black;">C<sub>b</sub></span><span style="font-size: 11pt; color: black;">来分别表示一种亮度分量信号和两种色度分量信号。</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">C<sub>r</sub>C<sub>b</sub></span><span style="font-size: 11pt; color: black;">模型与</span><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">空间的转换关系如下：</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; Y</span><span style="font-size: 11pt; color: black;">＝</span><span style="font-size: 11pt; color: black;">0.299R </span><span style="font-size: 11pt; color: black;">＋</span><span style="font-size: 11pt; color: black;">0.578G </span><span style="font-size: 11pt; color: black;">＋</span><span style="font-size: 11pt; color: black;">0.114B </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; C<sub>r</sub></span><span style="font-size: 11pt; color: black;">＝</span><span style="font-size: 11pt; color: black;">( 0.500R </span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">0.4187G </span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">0.0813B )</span><span style="font-size: 11pt; color: black;">＋</span><span style="font-size: 11pt; color: black;">128 </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">&nbsp; C<sub>b</sub>=( - 0.1687R </span><span style="font-size: 11pt; color: black;">－</span><span style="font-size: 11pt; color: black;">0.3313G </span><span style="font-size: 11pt; color: black;">＋</span><span style="font-size: 11pt; color: black;">0.500B )</span><span style="font-size: 11pt; color: black;">＋</span><span style="font-size: 11pt; color: black;">128 </span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">或者写成矩阵的形式，</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp; <img v:shapes="_x0000_i1040" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125838146.gif" width="341" height="74"></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;"><span style="font-size: 11pt; color: black;">RGB</span><span style="font-size: 11pt; color: black;">与</span><span style="font-size: 11pt; color: black;">Y</span><span style="font-size: 11pt; color: black;">C<sub>r</sub>C<sub>b</sub></span><span style="font-size: 11pt; color: black;">之间的变换关系可写成如下的形式，</span></div>
<div style="margin-top: 0px; margin-bottom: 0px; text-indent: 32px; line-height: 150%;">&nbsp; <img v:shapes="_x0000_i1041" alt="" src="%E9%A2%9C%E8%89%B2%E6%A8%A1%E5%9E%8B_files/2007822125838271.gif" width="278" height="74"></div><div class="datumrelate">上一篇：<a href="http://www.hzzhibang.com.cn/hzzhibang_Article_16572.html">CIE1931RGB 真实三原色表色系统</a><br>下一篇：<a href="http://www.hzzhibang.com.cn/hzzhibang_Article_15429.html">皱纹卫生纸轻工行业标准 </a></div></span>
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